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(* Performance test for mutexes and conditions *)
let mut = Mutex.create()
let niter = ref 0
let token = ref 0
let process (n, conds, nprocs) =
while true do
Mutex.lock mut;
while !token <> n do
(* Printf.printf "Thread %d waiting (token = %d)\n" n !token; *)
Condition.wait conds.(n) mut
done;
(* Printf.printf "Thread %d got token %d\n" n !token; *)
incr token;
if !token >= nprocs then token := 0;
if n = 0 then begin
decr niter;
if !niter <= 0 then exit 0
end;
Condition.signal conds.(!token);
Mutex.unlock mut
done
let main() =
let nprocs = try int_of_string Sys.argv.(1) with _ -> 100 in
let iter = try int_of_string Sys.argv.(2) with _ -> 1000 in
let conds = Array.create nprocs (Condition.create()) in
for i = 1 to nprocs - 1 do conds.(i) <- Condition.create() done;
niter := iter;
for i = 0 to nprocs - 1 do Thread.create process (i, conds, nprocs) done;
Thread.delay 3600.
let _ = main()
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